| 摘要 |
The invention relates to a power circuit, which prevents emergent stop of voltage supply from power circuit. The power circuit comprises: a switch type voltage stabilizer for driving the voltage reduction of the input voltage, a series voltage regulator which is connected with the switch type stablizer in series connection for driving the input voltage reduction, and a control circuit for stopping driving the series voltage regulator when the input voltage value exceeds the regulated voltage value. In this case, the switch type voltage stablizer of the power circuit is not driven before the electronic devices work due to breakdown and other reasons, thereby preventing emergent stop of voltage supply for electronic devices by the power circuit when the electronic device is working. In other word, the product can ensure the saftey of the system of the power circuit. |
